/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.table.runtime.operators.sort;

import org.apache.flink.runtime.state.VoidNamespace;
import org.apache.flink.runtime.state.VoidNamespaceSerializer;
import org.apache.flink.streaming.api.SimpleTimerService;
import org.apache.flink.streaming.api.TimerService;
import org.apache.flink.streaming.api.operators.AbstractStreamOperator;
import org.apache.flink.streaming.api.operators.InternalTimerService;
import org.apache.flink.streaming.api.operators.OneInputStreamOperator;
import org.apache.flink.streaming.api.operators.TimestampedCollector;
import org.apache.flink.streaming.api.operators.Triggerable;
import org.apache.flink.table.data.RowData;

/** Base class for stream temporal sort operator. */
abstract class BaseTemporalSortOperator extends AbstractStreamOperator<RowData>
        implements OneInputStreamOperator<RowData, RowData>, Triggerable<RowData, VoidNamespace> {

    protected transient TimerService timerService;
    protected transient TimestampedCollector<RowData> collector;

    @Override
    public void open() throws Exception {
        InternalTimerService<VoidNamespace> internalTimerService =
                getInternalTimerService("user-timers", VoidNamespaceSerializer.INSTANCE, this);
        timerService = new SimpleTimerService(internalTimerService);
        collector = new TimestampedCollector<>(output);
    }
}
